code: def test_percent_unique(self):
      primitive_func = self.primitive().get_function()
      assert primitive_func(self.array) == (8 / 10.0)
  
file_path: featuretools/featuretools/tests/primitive_tests/transform_primitive_tests/test_percent_unique.py
imports: import numpy
  import pandas
  from featuretools.primitives import PercentUnique
  from featuretools.tests.primitive_tests.utils import PrimitiveTestBase
label_desc: Use image node_id 1 for calling the TestPercentUnique obj's underlying member method code with example usage: obj.test_percent_unique() without return types